4G Technology

4G Technology

Abstract: -
In general, a generation is defined by the result of technology changes over a 10-15 year time frame. Thus, 4G would refer to whatever is deployed in the 2010-2015 period, assuming 3G deployment spans the 2000-2005 periods. Typically, this means a new air-interface with higher data rates in the least, and some see change in the way data transport is handled end-to-end.
There is no formal definition of 4G, but what such technologies have in common, says Andy Fuertes, an analyst at Visant Strategies, a research firm, is that they are high-speed wireless networks covering a wide area, designed above all for carrying data, rather than voice or a mixture of the two.
It has various features such as low cost, scalability of mobile networks, wider bandwidths and higher bit rates etc. Multiple Inputs and Outputs Antenna System (MIMO), Orthogonal frequency division multiplexing (OFDM), Software Defined Radio (SDR) are the key technologies of 4G.
4G digital IP-based high-speed cellular systems are anticipated to account for 14% of total mobile wireless data revenues in 2007, with 4G carriers realizing a total of 50 million subscribers by year-end 2007. Revenues from 4G infrastructure sales are anticipated to reach $5.3 billion during 2007.
Pioneer of 4G are focusing on creating a convergent network that offers seamless IP connectivity over several interfaces and wireless network with very high data rates. In future, internet, cellular systems intranet etc will merge into a whole seamless wireless internet whose core network will be 4G IPV6 backbone architecture.